Correctly emit certain implicit references to 'self' even within
a lambda.

Bug #1 is that CGF's CurFuncDecl was "stuck" at lambda invocation
functions.  Fix that by generally improving getNonClosureContext
to look through lambdas and captured statements but only report
code contexts, which is generally what's wanted.  Audit uses of
CurFuncDecl and getNonClosureAncestor for correctness.

Bug #2 is that lambdas weren't specially mapping 'self' when inside
an ObjC method.  Fix that by removing the requirement for that
and using the normal EmitDeclRefLValue path in LoadObjCSelf.

rdar://13800041

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181000 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGClass.cpp b/lib/CodeGen/CGClass.cpp
index 2b9a55b..3fd0757 100644
--- a/lib/CodeGen/CGClass.cpp
+++ b/lib/CodeGen/CGClass.cpp
@@ -290,7 +290,7 @@
     return 0;
   }
   
-  const CXXRecordDecl *RD = cast<CXXMethodDecl>(CurFuncDecl)->getParent();
+  const CXXRecordDecl *RD = cast<CXXMethodDecl>(CurCodeDecl)->getParent();
   const CXXRecordDecl *Base = cast<CXXMethodDecl>(GD.getDecl())->getParent();
 
   llvm::Value *VTT;
@@ -2232,10 +2232,10 @@
 }
 
 void CodeGenFunction::EmitLambdaToBlockPointerBody(FunctionArgList &Args) {
-  if (cast<CXXMethodDecl>(CurFuncDecl)->isVariadic()) {
+  if (cast<CXXMethodDecl>(CurCodeDecl)->isVariadic()) {
     // FIXME: Making this work correctly is nasty because it requires either
     // cloning the body of the call operator or making the call operator forward.
-    CGM.ErrorUnsupported(CurFuncDecl, "lambda conversion to variadic function");
+    CGM.ErrorUnsupported(CurCodeDecl, "lambda conversion to variadic function");
     return;
   }